Point To Point Troubleshooting - Blodgett BCX14E Troubleshooting Manual

~ (Bottom) DC Voltage Power Supply Test Points ~
# Component
(Lower)
1
DC Power Supply
(Lower)
2
DC Power Supply
3
BCX2 (Logic Board)
BCX2 (Logic Board) /
4
DC Power Supply
BCX2 (Logic Board) /
5
DC Power Supply
6
(IFB) Relay Board
~(Top) Heat DC Voltage Power Supply Test Points 2 ~
# Components Testing
(Top) Heat
1
DC Power Supply
(Top) Heat
2
DC Power Supply
Boiler High Limit /
3
Hot Air Contactor
Boiler High Limit /
4
Hot Air Contactor
Hot Air High Limit /
5
Hot Air Contactor
Hot Air High Limit /
6
Hot Air Contactor
# Components Testing
1
Motor Speed Inverter
Mode Switch to
2
BCX2 (Logic Board)
Motor Speed Inverter to
3
BCX2 (Logic Board)
IFB Relay Board to
4
BCX2 (Logic Board)
Motor Speed Inverter to
5
BCX2 (Logic Board)
BCX14E - Trouble shooting test points
Black lead
Power supply (N)
Power supply (-V)
J1 Connector (J1-1) BK- 3
24vdc_Rtn
J1 Connector (J1-1) BK- 3
24vdc_Rtn
(- V) Black 24vdc_Rtn
terminal at power supply
J7 Connector (J7-2) Black
Black lead
Power supply (N)
Power supply (-V) Black
Contactor Coil (A2) Black Wire
Contactor Coil (A2) Black Wire
Contactor Coil (A2) Black Wire
Contactor Coil (A2) Black Wire
~ Cool Down Operation at Low Speed ~
Black lead
Mode SW Terminal #4
Inverter Terminal #CW2
( IFB ) Connector J3 (J3-7)
( Inverter ) Terminal #2 & #3
Test Points
J1 Connector (J1-4) RD- 1
terminal at power supply
J1 Connector (J1-4) RD- 1
J7 Connector (J7-1) Red
Test Points
Boiler High limit ( Red Wire )
Boiler High limit ( Yellow Wire )
Hot Air High limit ( Red Wire )
Hot Air High limit ( Orange Wire )
Test Points
( N )
( Inverter ) Connector J1-4
B l o d g e t t O v e n
Red Lead
Power supply (L)
Power supply (+V)
+24vdc_H
(+V) Red +24vdc_H
+24vdc_H
Red Lead
Power supply (L)
Power supply (+V) Red
Red Lead
( L )
J1 Connector J1-4
J1 Connector J1-4
J1 Connector J1-4
Page 36
Voltage
AC + DC
115 VAC
24 VDC
24 VDC
24 VDC
24 VDC
24 VDC
Voltage AC
+ DC
115 VAC
24 VDC
24 VDC
24 VDC
24 VDC
24 VDC
Voltage AC
+ DC
115 VAC
24 VDC
24 VDC
24 VDC
24 VDC